Math & Science

Shannon Entropy Calculator — Bits, Nats & Perplexity

Simpson’s Diversity Index Calculator — Biodiversity & Evenness Analysis

Sensitivity & Specificity Calculator: PPV, LR, and Diagnostic Accuracy

Sample Size Calculator — Precision Sampling for Surveys & Research

Relative Risk & Odds Ratio Calculator — Epidemiological Measures Explained

Polynomial Curve Fitting Calculator — Least Squares Regression & Prediction

Poisson Distribution Calculator — Probability, Mean & Variance Solver

Pearson Correlation Calculator: Measure Linear Relationships & Statistical Significance

Percentile Calculator — Find Rank & Value in Any Dataset

Odds & Probability Calculator: Convert Betting Lines & Payouts

Normal Distribution Calculator — Probability, Z-Scores & Inverse CDF

Projectile Motion Calculator — Range, Height & Flight Time Solved

Exponential Distribution Calculator: PDF, CDF & Survival Analysis

False Positive Calculator: Predictive Value & Bayes’ Theorem

Fisher’s Exact Test Calculator — P-Value & Odds Ratio for 2×2 Tables